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Turkish Journal of Electrical Engineering and Computer Sciences

No abstract provided.

Bag Distributed Real-Time Operating System And Task Migration, Beki̇r Tevfi̇k Akgün

Turkish Journal of Electrical Engineering and Computer Sciences

BAG is a distributed operating system designed for real-time applications which is run on a distributed real-time system. The heterogeneously distributed BAG system consists of nodes which have VME-bus chassis, different types of processor modules, and an interconnection network. The operating system has three main parts having distributed properties: task migration, load balancing and a distributed file system. Heterogeneous task migration is based on the extended finite state machine (EFSM) programming model. The EFMS model has also eased the implementation of the migration mechanism. The load balancing algorithm is centralized in one node. But the overall system will be a …

Avalanche And Bit Independence Properties For The Ensembles Of Randomly Chosen N \Times N S-Boxes, Işil Vergi̇li̇, Melek D. Yücel

Turkish Journal of Electrical Engineering and Computer Sciences

Cryptographic test methods such as avalanche, strict avalanche and bit independence criteria, which measure the degree of security of the s-boxes of substitution-permutation networks, are applied to randomly generated ensembles of ( n \times n \) s-boxes. Statistical analysis of experimental data directs the work towards defining ``relative errors'' and examining the avalanche and strict avalanche criteria within ``relative error ranges''. Histograms of relative errors in each ensemble are evaluated, and combining the results of different ensembles corresponding to different values of the s-box size, variations of maximum relative errors versus the size of the s-box are depicted. Some predictions …

Accurate Parameter Estimation For An Articulatory Speech Synthesizer With An Improved Neural Network Mapping, Hali̇s Altun, Tankut Yalçinöz, K. Mervyn Curtis

Turkish Journal of Electrical Engineering and Computer Sciences

Neural network (NN) applications have recently been employed to extract the parameters of an articulatory speech synthesizer from a given speech signal. Results from these attempts showed that a single NN is insufficient to cover all of the possible configurations uniquely. Moreover, apart from their computational advantages, NN mapping is so far not superior to the other mapping techniques [1]. Thus there is a clear need to improve NN solution to the inverse problem. Results from our earlier experiments with an articulatory speech synthesizer have shown that the statistical characteristic of the articulatory target pattern vectors can be exploited for …

Performance Evaluation Of Safer K-64 And S-Boxes Of The Safer Family, Ekrem Aras, Melek D. Yücel

Turkish Journal of Electrical Engineering and Computer Sciences

If the characteristics of s-boxes of the SAFER family of ciphers are examined for the criteria of strict avalanche, bit independence, and XOR table distribution, experiments show that the ``exponentiating'' s-box has a weakness for an input difference of 128 (=10000000_{2}) and the ``logarithm-taking'' s-box has a weakness for an input difference of 253 (=11111101_{2}). However, since these experiments are performed by isolating the s-boxes from the general structure, they do not necessarily indicate a weakness in the overall algorithm. We propose a quick and rough test method, called the avalanche weight distribution criterion, to evaluate the overall performance of …

A More Efficient Design And Implementation Of Cal Programs In Natural Science Using Object-Oriented Technology, Jurgen Friedrich

Turkish Journal of Electrical Engineering and Computer Sciences

With the amount and complexity of science topics and applications increasing, the need for appropriate and effective science education is constantly growing. Computer-based education is very promising to help both teachers and learners in their difficult task, which involves complex psychological processes. This complexity is reflected in high demands on the design and implementation methods used to create computer-assisted learning (CAL) programs. Due to their concepts, flexibility, maintainability and extended library resources, object-oriented technology (OOT) is very suitable to producing this type of pedagogical tool. The introduced approach is demonstrated by a basketball simulation program for instruction in Newtonian mechanics …

Ota-C Based Proportional-Integral-Derivative (Pid) Controller And Calculating Optimum Parameter Tolerances, Cevat Erdal, Ali̇ Toker, Cevdet Acar

Turkish Journal of Electrical Engineering and Computer Sciences

Proportional-integral-derivative (PID) controllers are one of the most important control elements used in the process control industry. In practice, operational amplifiers are generally used in analog controllers. On the other hand, the operational transconductance amplifiers recently developed, which have some positive properties compared to operational amplifiers, are not used in analog controller design at present. Furthermore, the optimum parameter tolerances for the proposed PID circuit by the use of parameter sensitivities are determined. These tolerances keep the relative error at the output of the controller due to parameter variations in the tolerance region.

Scalar Wave Diffraction By A Perfectly Soft Infinitely Thin Circular Ring, Fati̇h Di̇kmen, Ertuğrul Karaçuha, Yury Alexanderovich Tuchkin

Turkish Journal of Electrical Engineering and Computer Sciences

A new strong mathematically rigorous and numerically effective method for solving the boundary value problem of scalar (for example acoustic) wave diffraction by a perfectly soft (Dirichlet boundary condition) infinitely thin circular ring is proposed. The method is based on the combination of the Orthogonal Polynomials Approach, and on the ideas of the methods of analytical regularization. As a result of the suggested regularization procedure, the initial boundary value problem is equivalently reduced to the infinite system of the linear algebraic equations of the second kind, i.e., to an equation of the type ( (I + H) x = b …

Cover And Contents

Turkish Journal of Electrical Engineering and Computer Sciences

No abstract provided.

Orientations Of Graphs Which Have Small Directed Graph Minors., Glenn Randolph Berman

LSU Historical Dissertations and Theses

Graphs are characterized by whether or not they have orientations to avoid one or more of the digraphs K&ar;3 , S&ar;3 , and P&ar;3 . K&ar;3 , S&ar;3 and P&ar;3 are created by starting with a triangle, a three point star, or a path of length three respectively, and replacing each edge with a pair of arcs in opposite directions. Conditions are described when all orientations of 3-connected and 4-connected graphs must have one or more of the above digraphs as a minor. It is shown that double wheels, and double wheels without an axle, are the only 4-connected graphs …

The Effect Of Prime Word Processing On The Semantic Priming Effect., Satomi Imai

LSU Historical Dissertations and Theses

In three experiments the effect of ease of prime word access on semantic priming was investigated. Ease of prime access was manipulated by prime word frequency, by prime degradation, and by prime repetition. Primes accessed faster (high frequency prime words, repeated primes) should produce larger priming than those accessed more slowly (low frequency prime words, degraded prime words). The time course of priming was also examined by comparing a 150 ms SOA to a 500 ms. The results partially supported the hypothesis. There was a prime word frequency effect on priming in both short and long SOA conditions. High frequency …

An Exploration Of Middle And High School Students' Perceptions Of Deviant Behavior When Using Computers And The Internet., Annie Jean Harris Daniel

LSU Historical Dissertations and Theses

If the current trend continues, the use of computer technologies and the Internet will increase for teaching and education. It is urgent that researchers study computer and Internet deviance. The purpose of this study was to explore middle and high school students' perceptions of deviant behavior when using computers and the Internet. The target population for this study was middle and high school students. The accessible population included all students who attended a middle or high school in the East Baton Rouge Parish School which has computers that are capable of accessing the Internet (1,150 students---575 middle school students and …

Variables Related To Sexual Aggression In Male College Students., Laura Anne Estupinan-Kane

LSU Historical Dissertations and Theses

Using the Pathfinder computer algorithm comparisons were made of participants' knowledge organization of sexual, sexually aggressive, and aggressive concepts. Three hundred and fifty-two heterosexual males (81 admitting a past history and future likelihood of sexual aggressive/coercive behavior; 111 admitting a past history of engaging in sexual aggression; 88 admitting no past history of or future likelihood of engaging in sexual aggression) rated all possible pairwise combinations of 18 words relevant to sex, aggression, sexual aggression, and emotion. Analyses of the dependent variable, number of links, failed to support predicted differences as a function of level of sexual aggression in the …

Wake Rites: The Ancient Irish Rituals Of "Finnegans Wake"., George Cinclair Gibson

LSU Historical Dissertations and Theses

The complex of rites, rituals, and mythic reenactments known in Irish mythology as the Rites of Tara provides an interpretive model for James Joyce's Finnegans Wake. Using information and theories pertaining to the Rites of Tara obtained from sources used by James Joyce, a comparison of the Rites of Tara with Finnegans Wake reveals important correlates related to chronology, characters, architectonics, themes, and defining characteristics. The three separate chronological events presented by Wakean scholars as possible dates for the events in the Wake---Easter, an unnamed pagan festival, and the Vernal Equinox---converged on a single day at the Rites of Tara. …

Exploring Organizational Learning Of The Louisiana Cooperative Extension Service: A Qualitative Study Involving Parish Chairs Of Less Than Three Years Experience., Cathy Hirsch Hamilton

LSU Historical Dissertations and Theses

This qualitative study was designed to facilitate the description, analysis and utilization of continual learning within the Louisiana Cooperative Extension Service (LCES). The research linked exploration of a learning culture within an organization with the reflective practice of participatory action research methodology. Learning organizations promote knowledge sharing that allows for individual learning to make the transition into collective organizational learning. In order for transformative learning to occur, individuals must reflect on their actions to make sense of an experience. Explaining and thinking about what one is doing makes tacit knowledge explicit, therefore able to be shared and used for change. …

Epidemiology Of Salmonella In The Green Iguana (Iguana Iguana)., Mark Anthony Mitchell

LSU Historical Dissertations and Theses

The incidence of iguana-associated salmonellosis reported in humans during the 1990's is a public health concern. This research is the first attempt to describe the epidemiology of Salmonella in the green iguana. Seasonal prevalence of Salmonella in green iguanas and their environment were estimated at a commercial iguana farm in El Salvador. The prevalence of Salmonella was lower in adult iguanas (44%) than in yearlings (50%) (Odds ratio (OR): 0.77, 95% Confidence Intervals (CI): 0.6--0.96) and higher in male iguanas (50%) than females (41%) (OR: 1.5, 95% CI: 1.2--1.8). Salmonella recovery was lower in the fall (41%) sampling period than …

Space Geodetic Constraints On Plate Rigidity And Global Plate Motions., Giovanni Federico Sella

LSU Historical Dissertations and Theses

The Global Positioning System (GPS) has emerged over the last 10 years as the premier space geodetic technique for geologic observation with the benefits of both accuracy and economy. GPS data from more than 260 stations were processed utilizing GIPSY-OASIS software, and all available RINEX files for these stations beginning on January 1, 1993. The uniform processing strategy, combined with a rigorous independent error estimate of site velocities and the broad geographical distribution of these sites resulted in a global high-precision surface velocity data set. This data set has been used to: (1) compare the effects of different GPS antenna …

The Remote Neuropsychological Assessment -Category Test: Development And Validation Of A Computerized, Internet -Based Neuropsychological Assessment Measure., Jeffrey Nicholas Browndyke

LSU Historical Dissertations and Theses

In the current investigation, a prototype for the remote assessment of cognitive skills, the "remote neuropsychological assessment (RNA) model," was proposed, and the development and validation of a computerized, Internet-based neuropsychological assessment measure was undertaken to demonstrate the utility and effectiveness of this untapped model of assessment delivery. The Remote Neuropsychological Assessment-Category Test (RNA-CT), a test of abstract concept formation administered via the World Wide Web (WWW), was developed and contrasted with a conventional, non-computerized version of the measure---the Booklet Category Test (BCT). Traditional and novel measurement variables from both measures were compared in a randomized group design of normal …

Transition To Work: A Study Of New College Graduates., Carolyn Carter Collins

LSU Historical Dissertations and Theses

The success of the transition to work is affected by many factors, including the organization entry process itself. Research shows that the first year of employment is a critical time period and the organizational entry process is not dearly understood. The central focus of this study was to determine what exactly do new college graduates encounter as they enter the workplace, and does that experience affect their opinions and attitudes. Further, do women and African Americans have a similar or different experiences than white males in the transition process. An exploratory descriptive study of a random sample of Louisiana State …

Analysis And Mathematical Modeling Of Autonomously Oscillating Yeast Cultures., Abdelqader M. Zamamiri

LSU Historical Dissertations and Theses

The conditions that precede the onset of autonomous oscillations in continuous yeast cultures were studied in three different types of experiments. It was found that the final state of the culture depends on the protocol used to start-up the reactor. Reaching the desired operating point by slow dilution rate changes gave rise to different final states, two oscillatory states and one steady state, depending on the rate of change in dilution rate. The multiplicity of stable states at a single operating point is not explained by current distributed models and points towards a segregated mechanism of these oscillations. The ability …

Novel Formulation And Application Of Model Predictive Control., Guang-Yan Zhu

LSU Historical Dissertations and Theses

Model predictive control (MPC) has been extensively studied in academia and widely accepted in industry. This research has focused on the novel formulation of model predictive controllers for systems that can be decomposed according to their nonlinearity properties and several novel MPC applications including bioreactors modeled by population balance equations (PBE), gas pipeline networks, and cryogenic distillation columns. Two applications from air separation industries are studied. A representative gas pipeline network is modeled based on first principles. The full-order model is ill-conditioned, and reduced-order models are constructed using time-scale decomposition arguments. A linear model predictive control (LMPC) strategy is then …

It Rarely Occurs: Mock Juror Reactions To A Physician's Defense In A Lack Of Informed Consent Case., Douglas J. Zickafoose

LSU Historical Dissertations and Theses

Three experiments examine how expressions of probability concerning why a risk involved in a medical procedure was not disclosed influence mock juror decisions (e.g., liability, culpability, and damage awards). Across all three experiments, no differences were found in mock juror judgments of liability due to the probability expression used, be it verbal, quantitative, percentage, or frequency. Furthermore, differences in mean damage awards were only found when psychological uncertainty was manipulated using a frequency expression. However, an examination of the median damage awards suggests that some expressions of probability are likely to result in higher damage awards than others. Thus, while …

Water Resources Year In Review - Winter 2001, Annis Water Resource Institute

AWRI Reviews

No abstract provided.

Memorial: Veronica Maclay (1948-2000), Jenni Parrish

Faculty Scholarship

No abstract provided.

How Can An Association Of Law Schools Promote Quality Legal Education?, H.G. Prince

Faculty Scholarship

No abstract provided.

Implementation Of Parallel-Distributed Computation Under Load Balancing And Fault Tolerance, Gang Wu

Graduate Student Theses, Dissertations, & Professional Papers

No abstract provided.

Model-Based Path Testing, Jie Zhang

Graduate Student Theses, Dissertations, & Professional Papers

No abstract provided.

57th Montana Legislature: News Coverage Of The 2001 Session, Ericka Schenck Smith

Graduate Student Theses, Dissertations, & Professional Papers

No abstract provided.

Sampling For Diesel Particulate Matter In Mines, Michel Grenier, Mahe Gangal, Nicole Goyer, Sean Mcginn, Jennifer Penney, John Vergunst

Fiches

No abstract provided.

Breakdown Voltage In Thin Iii-V Avalanche Photodiodes, Mohammad A. Saleh

Electrical and Computer Engineering Faculty Research and Publications

1. The dead-space multiplication theory of Hayat et al. [Journal of Lightwave Technology 10, 1415 (1992)], in conjunction with the multiplication-width-independent ionization-coefficient model developed by Saleh et al. [IEEE Trans. Electron Devices 47, 625 (2000)], are shown to accurately predict breakdown voltages for thin avalanche photodiodes of GaAs, InP, In_0:52Al_0:48As, and Al_0:2Ga_0:8As, over a broad range of device widths. The breakdown voltage is determined from the analytical expression for the impulse-response-function decay rate.